private void Init() { if (_sheet == null) { if (!_wb.TryGetWorksheet(SheetName, out _sheet)) { _sheet = _wb.AddWorksheet(SheetName); _sheet.SetCalcEngineCacheExpressions(false); } _sheet.Visibility = XLWorksheetVisibility.VeryHidden; } _row = _minRow = _prevrow = 1; _clmn = _minClmn = _prevclmn = 1; Clear(); _sheet.Style = _wb.Worksheets.First().Style; }